statfs function in hdfs-fuse is not working

statfs function in hdfs-fuse is not working. It gives error like:

could not find method org/apache/hadoop/fs/FsStatus from class org/apache/hadoop/fs/FsStatus with signature getUsed

hdfsGetUsed: FsStatus#getUsed error:

NoSuchMethodError: org/apache/hadoop/fs/FsStatusjava.lang.NoSuchMethodError: org/apache/hadoop/fs/FsStatus

Problem: Incorrect passing of parameters invokeMethod function.
invokeMethod(env, &jVal, INSTANCE, fss, JC_FS_STATUS,
HADOOP_FSSTATUS,"getUsed", "()J");